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Field-induced incommensurate-to-commensurate phase transition in the magnetoelectric hexaferrite Ba0.5Sr1.5Zn 2(Fe1-xAlx)12O22

  • Hak Bong Lee
  • , Young Sang Song
  • , Jae Ho Chung*
  • , Sae Hwan Chun
  • , Yi Sheng Chai
  • , Kee Hoon Kim
  • , M. Reehuis
  • , K. Proke
  • , S. Mat'A
  • *Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Using neutron diffraction, we investigated the spin structures of magnetoelectric hexaferrite, Ba0.5Sr1.5Zn 2(Fe1-xAlx)12O22 (x=0.08) under a magnetic field (Hc). When the crystal was cooled in a zero field, longitudinal spin cones were observed at low temperatures. These incommensurate phases, however, were replaced by the commensurate phase [k1=(0,0,32) ] when the ferroelectricity was induced by an external field perpendicular to the c axis. Magnetic structure refinement confirms that this commensurate order is compatible with the spin-current polarization. We argue that planar magnetic anisotropy plays an important role in determining the magnetic structure that is responsible for its magnetoelectricity.

    Original languageEnglish
    Article number144425
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume83
    Issue number14
    DOIs
    Publication statusPublished - 2011 Apr 26

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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